Gear-drive hoist for elevators.



W. L. RUPNOW.

GEAR DRIVE HOIST FOR ELEVATORS.

APPLICATION FILED NOV. 6, 1911.

1,128,525. Patented Feb. 16, 1915.

2 SHEET$-SHEET 1.

W. L. RUPNOW.

GEAR DRIVE HOIST FOR ELEVATORS APPLICATION FILED NOV. 6, 1911.

1,128,525., Patented Feb. 16,1915.

2 SHEETS-SHEET 2.

WILLIAM L. RUPNOW, OF KANSAS CITY, MISSOURI.

GEAR-DRIVE HOIST FOB ELEVATORS.

Specification of Letters Patent.

Patented Feb. 16, 1915.

Application filed November 6, 1911. Serial No. 658,837.

T all whom it may concern:

Be it known that I, NILLIAM L. RUPNow, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Gear Drive Hoists for Elevators, of which the following is a specification.

This invention relates to gear drive hoists for elevators and the like, and has for its object to produce apparatus of this character by which a greater efiiciency can be obtained from the motor and elevator run at higher speed than with a worm drive.

A further object is to produce apparatus of this character having no end thrust and by which friction and consequent loss of power is reduced to the minimum.

Another object is to produce apparatus permitting of the use of a drum of larger diameter than with a worm drive, to avoid bending and hence reduce the wear and tear on the cables.

With these general objects in view and others as hereinafter appear, the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying draw ings, in which- Figure 1, is an end view of a gear drive hoist for elevators embodying my invention. Fig. 2, is a central vertical section of the same, the base and motor being shown in elevation. Fig. 3, is a vertical section on the line IIIIH of Fig. 2. Fig. 4, is a section on the line IV-IV of Fig. 2.

In the said drawing, 1 indicates the base, 2 the electric or other motor mounted on one end of the base, 3 a standard on the opposite end of the base, and 4: a housing mounted on the base between and in line with the motor and standard 3; said housing consisting of a lower half 5 and an upper half 6. The shaft 7 of the motor has keyed upon it as shown or otherwise, a brake wheel 8, and said wheel is secured on one end of a shaft 9 journaled in one side of the housing 4, and projecting into the latter and terminating by preference, in a centering point 10, engaging an axial cavity 12 in one end of a shaft 11 journaled in a bearing 13 secured in any suitable manner in standard 8. Se

cured on said shaft 11, is a peripherally grooved drum 14:, having its hub provided with an extension 15 journaled in the adjacent side of the housing, and provided with- 111 the latter, with an internal toothed gear 16 meshing with a pair of gear wheels 17, arranged in the same horizontal plane as and at opposite sides of shaft 9, the gear wheels 17 being journaled on a pair of stub shafts 18 carried by and projecting into the housing from the motor side of the same. The gear wheels 17 mesh with a drive pinion 19 secured on shaft 9, the arrangement being such that motion imparted by the motor to shaft 9 through the brake wheel 8, shall be transmitted from the pinion 19 through gear wheels 17 and gear wheel 16, to the drum, it being noted that by the use of the intermediate gears 17 the application of power on the drum is balanced and hence prevents the imposition of lateral strain on shaft 9 within the housing, and in this connection it will be apparent that by using gears 17 and 19 of difierent diameter or ratio, the gearing betwcen the motor and the'drum may be varied provided a different housing is used.

20 is an arm projecting from the housing and overlying the brake wheel 8, and provided with a semicircular chamber 21, a cylindrical cap 22 being secured on said arm, and with chamber 21 constituting a transversely extending perforated cylinder within which is rotatably mounted a solenoid magnet 23, of a common and wellknown type, provided with two alined cores 24:, and hence neither shown nor described in detail.

The arm 20 is provided in planes at opposite sides of the brake wheel, with depending arms 25 and pivoted to and between said arms are levers 26 whose upper ends are secured at 27 to the outer ends of the cores of the solenoid and above the latter are provided with adjacent stops 28 to limit such inward movement of the cores as might result in their physical contact and cause them to adhere or freeze together through residual magnetism when the circuit is broken, the said stops being adapted to engage the opposite ends of the cylinder constituted by arm 20 and cap 22.

The levers are provided with depending oppositely bowed brake shoes 29, disposed at opposite sides of the brake wheel and terminating at their lower ends in ears 30, through which slidingly extends a con.- necting rod 31, provided with heads or nuts 32 at its ends, and with coiled springs 33, between said ears and nuts and tending to cause the brake shoes-to frictionally engage the brake wheel, it being understood that while the elevator is in motion, the solenoid is energized and therefore attracts the levers and holds the brake shoes out of engagement with the brake wheel.

The standard 3, is provided with a cylinder 34 corresponding to that already described, and containing a solenoid magnet 35 provided with a pair of cores 36.

37 is a pair of pins projecting from standard 3, to a point adjacent to the web of the drum, and said pins are provided with enlargements 38, outward of the plane of the hub of the drum, and at their inner ends are connected by a cross bar or brace 39. Pivoted to said pins between the enlargements 38- and cross 39, are oppositely bowed shoes 40, terminating at their upper ends in vertical ears 41, and projecting from said ears to points at opposite ends of the cylinder 34 are arms 42, to

which are bolted at 43 the said cores 36.

To prevent the cores from coming into physical contact, the arms 42 are provided with stops 44, for engagement with opposite ends of cylinder 34.

To hold the brake shoes pressed outward and in engagement when the car is at rest, with the inn-er side of the peripheral portion of the'druin, an expansive spring 45 is interposed between the arms 42 of the brake shoes, and said spring is maintained in position by a. rod 46, extending through it and through the arms 42, the nuts 47 engaging the outer ends of said rod to hold it in position.

The driving operation will be obvious from the above description and drawings, and it will be understood that whenever the car is arrested by the person in control of the elevator, not shown, the circuit through the magnets is broken to permit the springs 33 and 45 to apply their respective brakes to wheel 8, and drum 14, the retarding action of both the drive shaft and drum tending to prevent the imposition of dangerous strain on the drive pinion and also making provision for the arrest of the car in the event that one of the brake mechanisms should get out of order and fail to respond when the circuit is broken. It is intended that the housing shall stand partly charged with a lubricant which in the rotation of the internally toothed 'gear' and described as obvious modifications will a suggest themselves to one skilled I1'l 'th8 art.

I claim: In a gear drive hoist for elevators, the combination of a base, a motor and a standard thereon, a housing on the base between 1 l the motor and standard, apairof alined shafts projecting into the housing from opposite sides thereof, one of said shafts being journaled in the housing and the other in said standard, a brake wheel securedon the motor shaft and the shaft journal-ed in the housing, a brake to cooperate with said wheel, a drum secured on the shaft journaled in the standard, between the latter'and the housing and journaled in the latter and provided therein with an internally toothed gear, a gear pinion within the housing centrally of the internally-toothed gear and secured onthe shaft journaled in thehousing, a pair of diametrically opposite gear wheels journaled on and within the housing andv each meshing with said pinion and said internally-toothed gear, and a brake to cooperate with the drum.

In testimony whereof I aflix my signature, in. the presence of two witnesses.

- WILLIAM L. RUPNOW.

lVitnesses: I

IQ THORPE,

GqY. THORPE,

Copies of this patent may be obtainedfor five cents each, by addressingflie Commissioner of Patents,

v Washington. D, 0.? 

